Query features with Arcade expression

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 /*  * Copyright 2022 Esri.  *  * Licensed under the Apache License, Version 2.0 (the "License"); you may not  * use this file except in compliance with the License. You may obtain a copy of  * the License at  *  * http://www.apache.org/licenses/LICENSE-2.0  *  * Unless required by applicable law or agreed to in writing, software  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the  * License for the specific language governing permissions and limitations under  * the License.  */  package com.esri.samples.query_features_with_arcade_expression;  import java.util.HashMap;  import javafx.application.Application; import javafx.geometry.Point2D; import javafx.scene.Scene; import javafx.scene.control.Alert; import javafx.scene.control.ProgressIndicator; import javafx.scene.input.MouseButton; import javafx.scene.layout.StackPane; import javafx.stage.Stage;  import com.esri.arcgisruntime.ArcGISRuntimeEnvironment; import com.esri.arcgisruntime.arcade.ArcadeEvaluationResult; import com.esri.arcgisruntime.arcade.ArcadeEvaluator; import com.esri.arcgisruntime.arcade.ArcadeExpression; import com.esri.arcgisruntime.arcade.ArcadeProfile; import com.esri.arcgisruntime.concurrent.ListenableFuture; import com.esri.arcgisruntime.data.ArcGISFeature; import com.esri.arcgisruntime.geometry.Point; import com.esri.arcgisruntime.layers.Layer; import com.esri.arcgisruntime.loadable.LoadStatus; import com.esri.arcgisruntime.mapping.ArcGISMap; import com.esri.arcgisruntime.mapping.view.Callout; import com.esri.arcgisruntime.mapping.view.MapView; import com.esri.arcgisruntime.portal.Portal; import com.esri.arcgisruntime.portal.PortalItem;  public class QueryFeaturesWithArcadeExpressionSample extends Application {   private MapView mapView;  private ArcGISMap map;  private final String calloutText = "Crimes in the last 60 days: ";   @Override  public void start(Stage stage) {  try {  // create stack pane and application scene  var stackPane = new StackPane();  var scene = new Scene(stackPane);   // set title, size, and add scene to stage  stage.setTitle("Query Features With Arcade Expression Sample");  stage.setWidth(800);  stage.setHeight(700);  stage.setScene(scene);  stage.show();   // authentication with an API key or named user is required to access basemaps and other location services  String yourAPIKey = System.getProperty("apiKey");  ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);   // create a progress indicator  var progressIndicator = new ProgressIndicator();   // create a portal item and use it to create a map  var portal = new Portal("https://www.arcgis.com/");  var portalItem = new PortalItem(portal, "539d93de54c7422f88f69bfac2aebf7d");  map = new ArcGISMap(portalItem);   // create a map view and set the map to it  mapView = new MapView();  mapView.setMap(map);   // set callout leader to appear at the bottom of the callout  Callout callout = mapView.getCallout();  callout.setLeaderPosition(Callout.LeaderPosition.BOTTOM);   // wait for the map to finish loading data from portal before accessing its layers  map.addDoneLoadingListener(() -> {  if (map.getLoadStatus() == LoadStatus.LOADED) {  Layer policeBeatsLayer = map.getOperationalLayers().get(0);  progressIndicator.setVisible(false);   // if map clicked, evaluate an arcade expression at that point  mapView.setOnMouseClicked(event -> {  if (event.getButton() == MouseButton.PRIMARY && event.isStillSincePress()) {  // get the location of the click on the screen  Point2D screenPoint = new Point2D(event.getX(), event.getY());   // convert the click location from screen coordinates to map coordinates  Point mapPoint = mapView.screenToLocation(screenPoint);   // identify any features on the layer at the clicked location  var identifyLayerResultFuture = mapView.identifyLayerAsync(policeBeatsLayer,  screenPoint, 0, false);  identifyLayerResultFuture.addDoneListener(() -> {  if (identifyLayerResultFuture.isDone()) {  try {  var identifyLayerResult = identifyLayerResultFuture.get();   // only execute query if the police beats layer has data at the selected point  if (identifyLayerResult.getElements().size() != 0) {  ArcGISFeature feature = (ArcGISFeature) identifyLayerResult.getElements().get(0);   // show callout and text without data  callout.setTitle(calloutText);  callout.setDetail("...");  callout.showCalloutAt(mapPoint);  callout.setVisible(true);   // setup arcade expression and evaluator  String arcadeExpressionString = "var crimes = FeatureSetByName($map, 'Crime in the last 60 days');\n" +  "return Count(Intersects($feature, crimes));";  var arcadeExpression = new ArcadeExpression(arcadeExpressionString);  var arcadeEvaluator = new ArcadeEvaluator(arcadeExpression, ArcadeProfile.FORM_CALCULATION);   // instantiate key/value pairs  var hashMap = new HashMap<String, Object>();  hashMap.put("$feature", feature);  hashMap.put("$map", mapView.getMap());   // evaluate the arcade expression asynchronously  ListenableFuture<ArcadeEvaluationResult> resultFuture = arcadeEvaluator.evaluateAsync(hashMap);   // wait for the expression to finish evaluating before attempting to access it  resultFuture.addDoneListener(() -> {  if (resultFuture.isDone()) {  try {  // get result from async method and round  var arcadeEvaluationResult = resultFuture.get();  var crimesCount = Math.round((double) arcadeEvaluationResult.getResult());   // add data from arcade evaluation to callout  callout.setDetail(String.valueOf(crimesCount));  } catch (Exception e) {  throw new RuntimeException(e);  }  }  });   } else {  // if no data is found at the selected point, hide the callout  callout.setVisible(false);  }   } catch (Exception e) {  throw new RuntimeException(e);  }  }  });  }  });   } else if (map.getLoadStatus() == LoadStatus.FAILED_TO_LOAD) {  new Alert(Alert.AlertType.ERROR, "Map failed to load").show();  }  });   // add the map view and progress indicator to the stack pane  stackPane.getChildren().addAll(mapView, progressIndicator);  } catch (Exception e) {  // on any error, display the stack trace.  e.printStackTrace();  }  }   /**  * Stops and releases all resources used in application.  */  @Override  public void stop() {  if (mapView != null) {  mapView.dispose();  }  }   /**  * Opens and runs application.  *  * @param args arguments passed to this application  */  public static void main(String[] args) {  Application.launch(args);  } }